Rotator



Nov. 1 8, 1958 A. F. DEMING ET AL ROTATOR 4 sheets-sheet 1 Filed June12, 1953 NDREW E DEMING. EMMOR V. SCHNEIDE By RICHARD H. JORDN Nov. 18,1958 A. F. DEMING ET AL 2,86l,265

` RoTAToR Filed June 12, 1953 4 SheezS-Shee"I 2 JNVENToRs,

` ANDREW F. DEM/Na V: EMMoR u scH/vErDER ByR/cHARD H. JoRDAN UnitedStates Patent O vice ROTATOR Andrew F. Deming and Emmor V. Schneider,Alliance, and Richard H. Jordan, Mansfield, Ohio, assignors, by mesneassignments, to The Alliance Manufacturing Company, Division ofConsolidated Electronics Industries Corporation, Alliance, Ohio, acorporation of Delaware Application June 12, 1953, Serial No. 361,324

19 Claims. (Cl. 343-766) The invention relates in general to rotatingdevices and more particularly to remote controlled rotator units,especially for antennas wherein the remote control unit and the rotatorunit are interconnected by only two conductors which may be the twolead-in conductors for the antenna and wherein the control unit containsan indicator and receives impulses from the rotator unit to establishthe correct follow-up indication.

Antenna rotators which have a remote control unit have previously beenconstructed; however, the present invention relates to a remote controlrotator wherein only two wires need be used to interconnect the remotecontrol unit and the rotator unit. Previously, at least three wires wererequired and often four or five wires in order to obtain a reversiblerotational direction of the antenna rotator and to send some form ofsignal from the rotator unit down to the remote control unit so that thesystem would shut itself olf upon re-establishing alignment. The presentinvention solves the problem of using only two conductors or wires forinterconnecting the rotator unit and the remote control unit; and sinceonly two conductors are needed, it is possible to utilize the twolead-in wires of the typical high frequency dipole antenna to convey theelectrical requirements of the rotator unit and remote control unit.This may be accomplished by using highpass filters to connect the radiodevice and the antenna to the lead-in wires and utilizing low-passfilters to connect the remote control unit and the rotator unit to thelead-in wires.

An object of the invention s to provide an impulsing indicator andremote control unit interconnected by only two wires to a reversiblerotator unit.

Another object of the invention is to provide a remotely controlledrotator unit which is reversible in response to two different voltageconditions.

Another object of the invention is to provide an impulsing indicator andremote control unit which is operable by first and second currentconditions to change the indicator position.

Another object of the invention is to provide low-pass and high-passfilters connected to antennanlead-in wires to separate the antenna highfrequency currents from the control currents utilized between a remotecontrol unit and a rotator unit.

Another object of the invention is to provide in a remotely controlledrotator unit a motor driven switch which provides different currentconditions which control an impulsing indicator and which furtherlcontrol a switch energizing the rotator.

Still another object of the invention is to provide a reversibledirection rotator unit controlled by a manually reversible selectormeans and indicator means in a remote control unit interconnected byonly two conductors.

Still another object of the invention is to provide a voltage responsiveelectromagnetic means in a first unit controlled by a selector switch ina second unit to control the direction of rotation of a drive train inthe first unit and With current responsive electromagnetic means in thesecw Patented Nov. 18, 1958 2 ond unit controlled by an interrupterswitch in the first unit to control the selector switch in the secondunit.

Other objects and a, fuller understanding of this invention may be hadby referring to the following description and claims, taken inconjunction with the accompanying drawings, in which:

Figure 1 is a schematic diagram of the preferred embodiment of theinvention;

.Figure 2 is an end viewlof the rotator unit used in Figure l;

Figure 3 is a sectional view on the line 3-3 of Figure 2;

Figure 4 is a sectional view on the line 4-4 of Figure 3;

Figure 5 is an enlarged view of a portion of Figure 4;

Figure 6 is a partial view on the line 6-6 of Figure 5; and

Figure 7 is a schematic diagram of a modified form of the invention' TheFigures 1 to 6 show the preferred form of the invention with Figure 1schematically showing a remote control unit 11 and a rotator unit 12.The construction of the rotator unit 12 is shown in the Figures 2 to 6.The remote control unit 11 includes a transformer 13 having a primaryl4connectable to an alternating current source. The transformer 13 alsohas a center tapped secondary 15 having terminals 16, 17, and 18. Twelvevolts are obtained between terminals 16 and 17, and twenty-four voltsare obtained across the end terminals 16 and 18. A knob 19 is fastenedto a shaft 20 and a detent wheel 21 is fastened to the shaft 20. Adetent 22 holds the detent wheel 21 in any selected rotational position.An escapement Wheel 25 is also journalled to the shaft 20 and iscontrolled by a r-ockable verge 26. The knob 19 carries a pointer 23which co-operates with an indicator 24 moved in accordance with themovement of the escapement wheel 25. The verge 26 is pivoted at 27, anda spring 28 urges a tooth 29 of the verge 26 into engagement with theescapement wheel 25. When the verge 26 is rocked against the urging ofthe spring 28, a tooth 30 of the verge engages the escapement wheel 25and thus permits step-by-step movement of this escapement wheel.

The detent wheel 21 carries a secondary selector switch 33 which is adouble throw switch. The selector switch 33 includes first and secondblades 34 and 35 insulatively carried on the detent wheel 21. Theseblades lie parallel to the shaft 20. A coil spring 36 has a first end 37carried by a contact disk 39 and has a second end 38 carried by a secondcontact disk 40. The two contact disks 39 and 40 are electricallyconnected together and connected to a terminal 41. The escapement wheel25 carries' an insulator bar 42 which is parallel to the blades 34 and35 and is wider than the width of the two blades. The blade 34 isadapted to make contact with a tongue 31 on the contact disk 40, and theblade 35 is adapted to make contact with a tongue 32 on the contact disk39.

The position of the detent wheel 21 controls the position of a primaryswitch contact 44, and the position of the escapement wheel 25 controlsthe position of a primary switch contact 45. When the detent wheel 21and escapement wheel 25 are aligned, the primary switch 44-45 is in anopen condition, as caused by a cam 61 moved with wheel 25 and abuttableagainst switch contact 45. The primary switch 44-45 is connected in theenergization leads to the primary 14. l

The terminal 18 is connected to the blade 35 by a conductor 46, and theterminal 17 is connected to the blade 34 by a conductor 47. The terminal41 is the common terminal of the selector switch33, and it is connectedto a winding 48 of a current relay 49. The other end of the winding 48is connected by a conductor 50 to a terminal 51 of a low-pass filter5,2. The other input terminal 53 of the low-pass filter 52 isl connectedby a conductor 54 to the terminal 16. The low-pass filter 52 has outputterminals 55 and 56 which are connected to lead-in wires 57 and 58. Ahigh-pass filter 59 connects a radio device 60 to the lead-in .wires 57and 58.

The upper end of the lead-in wires 57 and 58 is connected through asecond low-pass filter 68 to the rotator unit 12. The two lead-in wiresare connected to an antenna 69 through a second high-pass filter 70. Avoltage solenoid 71 is connected across the output terminals 72 and 73of the low-pass filter 68. The voltage solenoid 71 has a movable core 74and also controls a switch blade 75. The switch blade 75 co-operateswith switch contacts 76 and 77. The switch contact 77 is connectedthrough a choke 78 to a terminal 79 to which this switch contact 76 isconnected. The motor in the rotator unit 12 is a single phase shadedpole induction motor 80 having one terminal connected to the terminal79. The other terminal of the motor 80 is connected through aninterrupter switch 81 to the terminal 72 of the filter 68. The motor 80drives a speed reducing gear train 84 which has an output 85 connectedto the shaft 86 of the antenna 69. The interrupter switch 81 is actuatedby the gear train 84 and is designed to be only momentarily actuated toan open condition and cannot be maintained in an open position.

The Figures 2 to 6 show the details of construction of the gear train84. The rotator unit 12 includes a housing 89 which encloses the motor80. The motor 80 has a drive shaft 90 carrying a drive pinion 91. Thedrive pinion 91 meshes with an idler pinion 92 and with a first drivegear 93. The idler pinio-n 92 meshes with a second drive gear 94. TheFigure 5 shows to an enlarged scale that the drive gears 93 and 94 arecoaxial and mounted on hubs 95 and 96, respectively, which are journaledon an intermediate shaft 97. Because of the idler pinion 92, the drivegears 93 and 94 rotate in opposite directions. The intermediate shaft 97is axially connected to the solenoid core 74 as shown in Figure 1. Thus,the intermediate shaft 97 may axially move to the right from a firstlimit position as shown in Figure 5 to a second limit position. Theshaft 97 carried pins 98 and 99 with the pin 98 receivable in a recess100 in the hub 95 and engageable with a drive lug 102 on the innerperiphery of this recess 100. Similarly, the pin 99 is receivable in arecess 101 in the hub 96 and engageable with a drive lug 103 in thisrecess 101. The recesses 100 and 101 are oppositely disposed; and hence,the pins 98 and 99 are alternately engageable with the drive lugs 102and 103. These pins and lugs thus form a positive clutch with theintermediate shaft 97 being drivingly connected to the drive gear 94 inthe position shown in Figure 5. Alternately, upon movement of theintermediate shaft to the right to the second limit position, the seconddrive gear 94 is disengaged from the shaft 97 and the second drive gear93 is placed in driving connection with the shaft 97. The pull of thesolenoid 71 is to the right as viewed in Figure 5, and the gear train 84may be disposed so that gravity will urge the shaft 97 to the left tothe first limit position or a spring means may be utilized for thisurging. The intermediate shaft 97 drives a pinion 104 which connectsthrough additional gearing 105 to drive a shaft mount 106. A cam disk107 is driven from the drive train 84 to momentarily actuate theinterrupter switch 81 to an open condition.

Operation The rotator unit 12 is a reversible unit which will rotate theantenna shaft 86 in either rotational direction and in so doing willmomentarily open the interrupter switch 81. The remote control unit 11controls the operation of the rotator unit 12 and further contains anindicator 24. The operator will grasp the knob 19 to rotate it in eitherdirection. If it is rotated clockwise, for example, the shaft 20, thedetent wheel 21, and the pointer 23 all move clockwise. The escapementwheel 25 remains stationary since it is held by the tongue 29 of theverge 26. Thus, the insulator bar 42 remains stationary, and the primaryswitch 44 45 closes because of the non-alignment of the detent wheel 21and escapement wheel 25. This energizes the transformer 13. The blade 34electrically contacts the tongue 31 on the contact disk 40. Thiscompletes the circuit of the secondary 15 from the terminal 17 throughthe conductor 47, the blade 34, contact disk 40, terminal 41, currentrelay 49, conductor 50, to the terminal 51 of the filter 52. Theterminal 16 of the secondary is connected by conductor 54 to theterminal 53 of the filter 52. This places twelve volts across terminals51 and 53. These twelve volts are passed by the low-pass filter 52through the lead-in wires and lowpass filter 68 to the rotator unit 12.

The voltage solenoid 71 is voltage responsive and has insufficient pullon twelve volts to move the core 74 into the solenoid 71. Thus, theshaft 97 is in the position shown in Figure 5 for a drive connectionthrough drive gear 94. This will rotate thel antenna shaft 86 in theappropriate direction. As the shaft 86 rotates, the interrupter switch81 is momentarily 'actuated by the cam disk 107. This momentarily opensthe series circuit ofl the switch 81 and motor 80. During this momentaryinterruption the load on the secondary 15 will be considerably reducedsince only the voltage solenoid 71 is being energized in the rotatorunit 12 rather than the solenoid 71 plus the motor 80. This causes aconsiderable `current change, and the current relay 49 in the remotecontrol unit 11l is responsive to this change in current. Upon initialenergization of the motor 80, the current relay 49 would be energized torock the verge 26 causing tongue 30 to be in engagement with theescapement wheel 25. During the momentary interruptions caused by theinterrupter switch 81 the current relay 49 will drop out to rock theverge 26. This will cause a step-by-step arcuate movement of theescapement wheel 25 for each interruption by the interrupter switch 81.This will continue until the indicator 24 again becomes aligned with thepointer 23 whereupon the primary switch 44-45 will be opened.

The knob 19 may be rotated in a counterclockwise direction which meansthat the transformer 13 will again become energized, the blade 35 willelectrically contact the tongue 32 of the contact disk 39 to placetwenty-four volts across the terminals 51 and 53. With this highervoltage, the voltage solenoid 71 will be energized sufficiently to movethe core 74 into the solenoid 71, and hence, clutch 99-103 will bedisengaged and clutch 98-102 will become engaged. This will rotate theantenna shaft in a direction opposite to that formerly effected. The camdisk 107 will again periodically actuate the interrupter switch 81 tocontrol the current relay 49. The actuatio'n of the voltage solenoid 71will close switch blade 75 against contact 77 which will place in serieswith the motor 80, the choke 78. This makes more nearly Constant thecurrent supplied to the motor 80 and to the current relay 49.

Details of construction of the remote control unit 11 and rotator unit12 may be similar to that shown in the copending Application Serial No.190,506, filed October 17, 1950, entitled Remote Control ImpulsingRotaton now Patent No. 2,682,628, issued June 29, 1954.

The Figure 7 shows another modification of the invention. A remotecontrol unit contains many parts similar to those shown in the remotecontrol unit 11, and hence, is marked with the same reference numbers.The' blade 34 is connected by a conductor 116 through a dry diskrectifier 1,18- to a terminal 120. The blade 35 isl connected by aconductor 117 through a dry disk rectifier 119 to the terminal 120. Therectifiers 118' and 119 vinterrupter switch to an open condition.

asemes are connected 'in oppos'ition relative to the terminal 120. Aconductor 121 interconnects the terminal 120 and a terminal 122 on asolenoid 123. The solenoid 123 has first and second windings 124 and125. -The winding 124 has a second terminal 126, and the winding 125 hasa second terminal 127. The terminal 126 is connected by a conductor 128to a terminal 129 ofV a secondary 130 of a transformer 131. A terminal132 of the secondary 130 is connected by a conductor 133 to the terminal41. The conductor 128 connects to the low-pass filter 52, and aconductor 134 connects the terminal 127 to the low-pass filter 52. Thelead-in wires 57 and 58 are again connected to a second low-pass filter68 having terminals 72 and 73. A direct current permanent magnet motor138 is connected in series with the interrupter switch 81 across theterminals 72 and 73. The motor 138 drives the antenna shaft 86 through adrive train 139 which includes the cam disk 107 actuated by theinterrupter switch 81.

Operation The circuit of Figure 7 again uses an impulsing indicator anda control unit 115 to control a rotator unit 114. When the operatorturns the knob 19 clockwise, the transformer 131 Will become energized'and the blade 34 will conduct current through the rectifier 118, throughthe winding 125, to the low-pass filter 52. This will supply directcurrent of one polarity to the direct current motor 138 causing it torotate in a particular direction. iThe current flow through the directcurrent motor 138 plus the permanent magnet in this motor is a combinedelectrical and magnetic means which determines the direction ofrotation. The speed reducing drive train 139 will thus rotate theantenna shaft 86 in the appropriate direction. The cam disk 107 willmomentarily actuate the This will deenergze the solenoid winding 125.The solenoid winding 124 remains energized continuously from thesecondary 130 through conductors 133 and 128 and the selected one of therectifiers 118 and 119. The windings 124 and 125 are wound in oppositionand of equal ampere turns so that upon de-energization of the winding125 by the opening of the interrupter switch 81, the solenoid 123 willexert a pull to rock the verge 26. When the intermpter switch 81 againclo-ses after its momentary open condition, the solenoid 123 will beefiectively neutralized by equal and opposite energization on thewindings 124 and 125. This releases the verge 126 under the urging ofthe spring 28. The escapement wheel 25 will thus step-by-stepangularlymove to a position coinciding with the selected position of the knob 19and pointer 23. The

mechanism will shut itself off upon re-alignment of the pointer 23 andindicator 24.

A counterclockwise rotation of the knob 19 will cause the blade 35 tomake contact with the tongue 32; and hence, current will fiow throughthe rectifier 119. Each o-f the windings 124 and 125 will thus havecurrent fioW therethrough in a direction opposite to that which wasformerly effected. However, these two windings are still equally andoppositely energized so that there is no pull on the verge 26. Theopposite polarity of direct current, combined with the magnetic field ofthe permanent magnet, will cause the direct current motor 138 to rotatein the opposite direction and hence rotate the antenna shaft 86 in theopposite direction. Again, the momentary actuation of the interrupterswitch 81 will periodically de-energize the solenoid winding 125 to rockthe verge 26, and hence, permit re-alignment of the pointer 23 andindicator 24 to de-energize the remote control unit 115 as well as therotator unit 114.

In Figures 1 and 7 it may be noted that there is a voltage responsiveelectromagnetic means in the rotator unit Controlled by a selectorswitch in the control unit to control the direction of rotation andfurther that there Lis a current responsive electromagnetic means in thecontrolunit controlled by the interrupter switch in the rotator unit tocontrol the selector switch in the control unit.

The requirement of only two conductors interconnecting the rotator andcontrol units makes possible the utilization of the lead-in wires 57 and58 as the current carrying conductors for the power to the rotator unitas well as the signals sent back from the rotator unit to control theselector switch in the control unit. Further, these two conductors carrypower current which has two different voltage conditions so that avoltage responsive electrom-agnetic means in the rotator unit maydetermine the correct direction of rotation of the antenna shaft.

The power current and control signals on the two conductors 57 and 58 isof power frequency, such as sixty cycle, or is direct current which ineither event will be passed by the low-pass filters 52 and 68 which havelow impedance to low frequency and high impedance to high frequency.Further, the radio signals, such as H. F., -V. H. F., or U. H. F., arepassed from the antenna 69 through the high-pass filters 70 and 59 tothe radio device 60. These high-pass filters will have high impedance tolow frequency and direct current and low impedance to high frequency.

Although this invention has been described in its preferred form with acertain degree of particularity, it is understood that. the presentdisclosure of the preferred form has been made only by way of exampleand that numerous changes in the details of construction and thecombination and arrangement of parts may be resorted to withoutdeparting from the spirit and the scope of the invention as hereinafterclaimed.

What is claimed is:

1. A mechanism comprising a 'control unit and a drive unitinterconnectable by two conductors, said drive unit including anelectric motor connectable to said two conductors and driving a drivetrain, a motor driven interrupter switch connectable to said twoconductors and actuatable to establish first and second currentconditions on said two conductors, and first electromagnetic meansresponsive to first and second voltage conditions to determine therotational direction of said drive train, said control unit includingvoltage terminals, a selector switch connected to said terminals and tosaid two conductors to select said first and second voltage conditionson said two conductors, and second electromagnetic means connected tosaid two conductors and responsive to said first and second currentconditions on said two conductors and connected to operate said selectorswitch.

2. A remotely controlled antenna rotator comprising a remote controlunit and an antenna rotator unit for rotating an antenna having firstand second lead-in wires connectable to a radio device, said antennarotator unit including, a housing, an antenna shaft mount rotatablerelative to said housing, a drive train having an output connected tosaid shaft mount, a low-pass filter, an electric motor connectablethrough said low-pass filter to said lead-in wires and driving saiddrive train, a motor driven interrupter switch connectable to saidlead-in wires and actuatable to establish first and second currentconditions on said lead-in wires, first electromagnetic means responsiveto first and second voltage conditions to determine the rotationaldirection of said drive train, and a high pass filter to connect saidantenna to said lead-in wires, said remote control unit includingvoltage terminals, a selector switch connected to said terminals andthrough a second low-pass filter to said lead-in wires to select saidfirst and second voltage conditions, and second ele'ctromagnetic meansconnectedto said lead-in;

wires and responsive to said first and second current conditions, andmeans to operate said selector switch from said second electromagneticmeans.

3. A remotely controlled antenna rotator comprising a remote control andindicator unit and an antenna rotato; unit for rotating an antennahaving first and secvond lead-in wires connectable to a radio device,said antenna rotator unit including a housing, an antenna shaft mountrotatable relative to said housing, a drive train having an outputconnected to said shaft mount, a low-pass filter, an electric motorconnectable through said low-pass filter to said lead-in wires anddriving said drive train, a motor driven interrupter switch connectableto said lead-in wires land actuatable to establish first and secondcurrent conditions on said lead-in wires, first electromagnetic meansresponsive tozfirst and second voltage conditions to determine therotational direction of said drive train, and a high-pass filter toconnect said antenna to said lead-in wires, said remote control unitincluding voltage terminals, a selector switch connected to saidterminals and through a second low-pass filter to said lead-in wires toselect said first and second voltage conditions, and secondelectromagnetic means connected to said lead-in wires and responsive tosaid first and second current conditions, an indic-ator operated withsaid selector switch, and means to operate said indicator and saidselector switch from said second electromagnetic means.

4. A mechanism comprising a control unit and a drive unitinterconnectable by only first and second conductors, said drive unitincluding a housing, a drive train in said housing having an output andan input, a two terminal electric motor, means for connecting saidelectric motor to said drive train input to drive said output thereof ineither direction, an' interrupter switch in said housing, means drivenin accordance with the drive of said drive train to actuate saidinterrupter switch, means for connecting said first and secondconductors to said two motor terminals and to said interrupter switch toprovide energization to said motor, said control unit including, aframe, a reversibly movable escapement device in said frame, means toselectively urge said escapement device in opposite directions, aselector switch physically connected for operation with said selectivemeans, voltage terminals, a verge 'carried by said frame and operable torelease said escapement device in either direction, firstelectromagnetic means in said frame operable to operate said verge meansfor connecting said manual selector switch and said voltage terminals tosaid two conductors to select first and second voltage conditions onsaid two conductors corresponding to the two movement directions of saidescapement device, said mechanism also including second electromagneticmeans for cstablishing first and second movement directions of saiddrive train output in -accordance with the selected one' of said firstand second voltage conditions on said two conductors, actuation of saidinterrupting switch effecting first and second current conditions onsaid two conductors, and said first electromagnetic means beingresponsive to said first and second current conditions on said twoconductors to operate said verge to release said escapement device.

5. A mechanism comprising a remote control unit and a rotator unitinterconnectable by only first and second conductors, said rotator unitincluding, a drive train having an output and an input, a two terminalelectric motor, means for connecting said electric motor toV said drivetrain input to rotate said output in either direction, a normally closedinterrupter switch in said housing, means driven in accordance witheither rotational direction of said drive train output to repetitivelyand only momentarily actuate said interrupter switch to an opencondition, means for connecting said first and second conductors to saidtwo motor terminals through said interrupter switch, said remote controlunit including, a frame, a reversibly rotatable escapement devicejournaled in said frame, spring means, manual means to selectivelyStress said spring meansin opposite directions to urge said escapementdevice in opposite rotational directions, a manual double-throw selectorswitch physically connected for simultaneous operation with said manualasmek means, alternating lcurrent terminals, a verge carried by saidframe and operable to release said escapement device in either directionstep by step, first electromagnetic means in' said frame operable tooperate said verge, means for connecting said manual selector switch andsaid alternating current terminals to said two conductors to selectfirst and second voltage conditions corresponding to the two rotationaldirections of said escapement device, said mechanism also includingsecond electromagnetic means for establishing first and secondrotational directions of said drive train output in accordance with theselected one of said first and second voltage conditions, eitherdirectio-n of operation of said drive train output effecting periodicand momentary operation of said interrupting switch to said opencondition, open and closed conditions of said interrupting switcheffecting first and second current conditions on said conductors, andsaid first electromagnetic means being responsive to said first andsecond current conditions to operate said verge to release saidescapement devicev 6. A mechanisn comprising a remote control unit and arotator unit interconnectable by first and second conduct-ors, saidrotator unit including, a housing, a mount rotatable relative to saidhousing, a reversible direction a speed reducing drive train having anoutput connected to said mount and having an input, an electric motorhaving two terminals, means for connectng said electric motor to saiddrive train input to rotate said mount in either direction, a normallyclosed interrupter switch in said housing, means driven in accordancewith either rotational directio-n of said mount to repetitively and onlymomentarily actuate said interrupter switch to an open condition, meansfor connecting said first and second conductors to said two motorterminals through said interrupter switch, said remote control unitincluding, a frame, a reversibly rotatable escapement device journaledin said frame, spring means, manual means to s-electively stress saidspring means in opposite directions to urge said escapement device inopposite rotational directions, a manual double-throw selector switchphysically connected for simultaneous operation with said manual means,alternating current terminals, a rockable verge carried by said frameand operable to release said escapement device in either direction stepby step, first electromagnetic means in said frame opera'ole to operatesaid verge, means for connecting said manual selector switch and saidalternating current terminals in series to said two conductors to selectfirst and second voltage conditions corresponding to the two rotationaldirections o-f said escapement device, said mechanism also includingsecond electromagnetic means for establishing first and secondrotational directions of said mount in accordance with the selected oneof said first and second voltage conditions, either direction ofoperation of said mount effecting periodic and momentary operation ofsaid interrupting switch to said open condition, open and closedconditions of said interrupting switch effecting first and secondcurrent conditions on said conductors, and said first electromagneticmeans being responsive to said first and second current conditions torock said verge to release said escapement device.

7. A mechanism comprising a remo-te control unit and a rotator unitinterconnected by first and second cenductors, said rotator unitincluding a housing, a mount rotatable relative to said housing, areversible direction speed reducing drive train having an outputconnected to said mount and having an input, an electric motor havingtwo terminals, means for connecting said electric motor to said drivetrain input to rotate said mount in either direction, a normally closedinterrupter switch in said housing, means driven in accordance witheither rotational direction of said mount to repetitively and onlymomentarily actuate said interrupter switch to an open condition, meansfor connecting said first and second 9,, conductors to said two motorterminals through said interrupter switch, said remote control unitincluding, a frame, a reversibly rotatable ratcheting device journalledin said frame, spring means, manual means to selectively stress saidspring means in opposite directions to urge said ratcheting device inopposite rotational directions, a manual double-throw selector switchphysically connected for simultaneous operation with said manual means,a step' down transformer having a primary adapted for energization froman alternating current source and having a secondary, a rockable vergecarried by said frame and operable to release said ratcheting device ineither direction step-by-step, first electromagnetic means in said frameoperable to operate said verge, means for connecting said manualselector switch and said transformer secondary in series to said twoconductors to select first and second voltage conditions correspondng tothe two rotational directions of said ratcheting device, said mechanismalso including second eelctromagnetic means for establishing first andsecond rotational directions of said mount in accordance with theselected one of said first and second voltage conditions, eitherdirection of operation of said mount effecting periodic and momentaryoperation of said interrupting switch to said open condition, open andclosed conditions of said interrupting switch eifecting first and secondcurrent conditions o-n said conductors, and said first electromagneticmeans being responsive to said first and second current conditions torock said verge to release said ratcheting device.

8. A remotely controlled rotator comprising an impulsing indicator andremote control unit and a rotator unit interconnectable by only firstand second conductors, said rotator unit including, a housing, a mountrotatable relative to said housing, a reversible direction speedreducing drive train having an output connected to said mount and havingan input, a two terminal electric motor, means for connecting saidelectric motor to said drive train input to rotate said mount in eitherdirection, a normally closed interrupter switch in said housing, meansdriven in accordance with either rotational direction of said mount torepetitively and only momentarily actuate said interrupter switch to anopen condition, first and second terminals insulatively carried on saidhousing, means for connecting said first and second housing terminals tosaid two motor terminals through said interrupter switch, said first andsecond housing terminals adapted to be connected to said first andsecond conductors, said impulsing indicator and remote control unitincluding, a frame, a reversibly rotatable ratcheting device journaledin said frame, spring means, manual means to selectively Stress saidspring means in opposite directions to urge said ratcheting device inopposite rotational directions, selector means operable incorrespondance with said manual means to select the degree of rotationand hence the ultimate position of said mount relative to said frame, amanual double throw selector switch physically connected forsimultaneous operation with said manual means, a step-down transformerhaving a primary adapted for energization' from an alternating currentsource and having a secondary, a rockable verge carried by said frameand operable to release said ratcheting device in either direction stepby step, first electromagnetic means in said frame operable to rock saidverge, first and second frame terminals insulatively carried by saidframe, means to connect said two co-nductors to ,said frame terminals,means for connecting said manual selector switch andv said transformersecondary in series with said frame terminals to select first and secondvoltage'conditions co'rresponding to the two rotational directions ofsaid ratcheting device, said remotely controlled rotator also includingsecond electromagnetic 'means forv establishing first and secondrotational directions of said mount in accordanceiwith the selected oneof said first mld second voltage conditions, either direction of opera-10 tion of said mount elfecting periodic and momentary op-v` eration ofsaid interrupting switch to said open condition, open and closedconditions of said interruptingswitch effecting first and second currentconditions on said conductors, a position indicator operable incorrespondencey with movement of said ratcheting device, and said firstelectromagnetic means being responsive to said first and second currentconditions to rock said verge to releasel said ratcheting device andthereby step-by-step move said indicator into a position correspondingto the position of said selector means.

9. An impulsing indicator remotely controlled antennarotator comprisinga remote control and indicator unit and an antenna rotator unit forrotating a high frequency antenna having a shaft and having first andsecond lead-in wires connectable to a radio device, said antenna rotatorunit including, a housing, an antenna shaft mount rotatable relative tosaid housing, a reversible direction speed reducing drive train havingan output connected. to said shaft mount and having an input, a twoterminal. electric motor, means for connecting said electric motor tosaid drive train input to rotate said shaft mount in either direction, anormally closed interrupter switch in said housing, means driven inaccordance with either rotational direction of said shaft mount torepetitively and only momentarilyV actuate said interrupter switch to anopen condition, first and second terminals insulatively carried on saidhousing, means for connecting said first and second housing terminals tosaid two motor terminals through said interrupter switch, said first andsecond housing terminals adapted to be connected to said high frequencyantenna, and said first and second housing terminals adapted to beconnected to said antenna lead-in wires, said remote control unitincluding, a frame, a reversibly rotatable ratcheting device journaledin said frame, spring means, manual means to selectively stress saidspring means in opposite directions to urge said ratcheting device inopposite rotational directions, selector means operable incorrespondence with said manual means to select the degree' of rotationand hence the ultimate position of Said antenna shaft, a manual doublethrow selector switch physically connected for simultaneous operationwith said manual means, a stepdown transformer having a primary adaptedfor energization from an alternating current source and having asecondary, a rockable verge carried by said frame and operable torelease said ratcheting device in either direction step by step, firstelectromagnetic means in said frame operable to rock said verge, firstand second frame terminals insulatively carried by said frame, means toconnect said lead-in wires to said first and second frame terminals,said radio device adapted to be connected to said lead-in wires nearsaid remote control unit, means for connecting said manual selectorswitch and said transformer secondary in series` with -said frameterminals to select first and second voltage conditions corresponding tothe two rotational directions of said ratcheting device, said antennarotator also including second electromagnetic means for establishingfirst and second rotational directions of said shaft mount in accordancewith the selected one of said first and second voltage conditions,either direction of rotation of said shaft mount effecting periodic andmomentary operation of said interrupting switch to said open condition,open and closed conditions of said interrupting switch eifecting firstand second current conditions on said lead-in wires, an antenna positionindicator operable in correspondence with movement of said ratchetingdevice, and said first electromagnetic means being responsive to saidfirst and second current conditions to rock said verge to release saidratcheting device and thereby step-by-step move said indicator into aposition corresponding to the position of said selector means.

10. An impulsing indicator remotely controlled antenna rotatorcomprising a remote control unit and an antenna i ll rotator unit forrotating a high frequency antenna having firstV and second lead-inVwires connectable to a radio device, said antennal rotator unitincluding, a housing, an antenna shaft mount rotatable relative to saidhousing, a reversible direction speed reducing drive train having anoutput connected to said shaft mount and having an input, a two terminalelectric motor, means for connecting said electric motor to said drivetrain input, electromagnetic means in said housing responsive to firstand second voltage conditions to selectively rotate said shaft mount ineither direction, a normally closed interrupter switch in said housing,means driven in accordance with eitherv rotational direction of saidshaft mount to repetitivelyl and. only momentarily actuate saidinterrupter switch to an open condition, first, second, third, andfourth terminals insulatively carried. on said housing, four. terminallow-pass filter means connecting said first and second housingterminalscto said two motor terminals through said interrupter switch,said low-pass filter' means having a high impe'dance to high frequency,high-pass filter: means having a highimpedance to low frequencyconnecting said firstand second housing terminals with said third andfo-urth housing terminals,rsaid third and fourth housingterminals'adapted to be connected to said high frequency antenna, andsaid first and second housing terminals adapted to be connected to saidantenna leadin wires, said remote control unit including, a frame, areversibly rotatable ratcheting device journalled in said frame, springmeans, manual means to selectively stress said spring means in oppositedirections to urge said ra'tcheting device' in' opposite rotationaldirections, selectorV means operable in correspondence with said manualmeans to select the degree of rotation and hence the ultimate positionof said antenna shaft, a manual double throw selector switch physicallyconnected for simultaneous operation withv said manual means, astep-down transformer having a primary adapted for energization from analternating current source and having a secondary, a rockable vergecarried by said frame and operable to release said ratcheting device ineither direction step by step, first and second frame terminalsinsulatively carried by said frame, second four terminal low-pass filtermeans connected to said lead-in wires at said remote control unit, saidsecond low-pass filter means having a high impedance to high frequency,said radio device adapted to be' connected to said lead-'in wires ontheV antenna side of said second low-pass filter means through a secondhigh-pass filter means having a high impedance to` low frequency, secondelectromagnetic means in. said frame operable to rock said verge, meansforv connecting said manual selector switch and said transformersecondary in series with said second lowpass filter means to select saidfirst and second voltage conditions corresponding to the two rotationaldirections of said ratcheting device, either direction of rotation ofsaid shaft mount effecting periodic and momentary operation of saidinterrupting switch to said open condition, open and closed conditionsof said interrupting switch eifecting first and second currentconditions on said lead-in wires, an antenna position indicator operablein correspondence with movement of said ratcheting device, and saidsecond electromagnetic means being responsive to said first and secondcurrent conditions to rock said verge to release said ratcheting deviceand thereby step-by-step move said indicator into a positioncorresponding to the position of said selector means.

11. A remotely controllable rotator interconnectable by4 only first andsecond conductors, comprising a rotator unit and a remote control unit,said rotator unit including a housing, an alternating current singlephase motor in said housing, a mount in said housing rotatable relativethereto, a drive train interconnecting said motor and said mount, firstand second drive gears'in said drive train rotatable in oppositerotational directions, positive clutch means in said drive trainalternately engageable with a selected one of said first'and seconddrive gears bymovement from one limit position to another, a voltagere-- sponsive solenoid connected to and capable of moving said clutchmeans from one limit position to the other by an applied voltage of afirst given value, yet incapable of' moving said clutch means from saidone limit position to the other by an applied voltage of only a secondgiven Value, a normally closed interrupter switch in said hous-V ing,means driven in accordance with the rotation of said mount torepetitively and only momentarily actuate said interrupter switch to anopen condition, means for connecting said-motor and said interrupterswitch in series to said first and second conductors, means forconnectingV said solenoid to said conductors in parallel With said motorand switch series combination, said remote control unit including, aframe, a reversibly rotatable escapement device journaled in said frame,spring means, manualv means to selectively stress said spring means inopposite directions to urge said escapement device in oppositerotational directions, a double-throw selector switch and connected forsimultaneous operation with said manual means, first, second, and thirdterminals adapted to be energized by an alternating current source withsaid first given voltage between said first and third terminals and saidsecond given voltage between said first and second terminals, a rockableverge carried by said frame and operable to permit step by steprotational movements of said escapement device in either rotationaldirection, a current responsive relay connected to rock-said verge,means forconnecting said selector switch to said alternating currentsource terminals and in series with said current relay and'with said twoconductors, said current relay energizable to actuated condition bycurrent flow therethrough to both said motor and said voltage responsivesolenoid and incapable of energization to actuated condition by currentflow therethrough to only said voltage responsive solenoid.

12. A remotely controllable antenna rotator for a high frequency antennahaving first and second lead-in wires connectable to a radio device,comprising an an'- tenna rotator unit and a remote control-unit,saidan'ten'ria' rotator unit including a housing, a shaded polealternating current-single phase motor in said housing, an antenna mountin said housing rotatablerelative ther'eto, a drive pinion driven bysaid motor, first and second drive gears coaxially journaledv on arotatable and longitudinally movable drive shaft, an idler pinion inmeslrwith said drive pinion and said second drive gear, said firstdrive' gear being in mesh with said drive pinionto thereby e'stablishopposite rotational directions of said coaxal drive gears, first andsecond positive clutches coaxial with said drive shaft and alternatelyengageable between said drive shaft and a selected one of said first andsecond drive gears by longitudinal movement from a first limit positionto a second, said clutches being urged into said first limit position, agear train inter-connecting said drive shaft and said antenna mount, avoltage responsive solenoid embracing an end of said drive shaft as thearmature thereof and capable of longitudinally moving said drive shaftfrom said first limit position to said second limit position by a firstgiven applied voltage, yet incapable of longitudinally moving said driveshaft from said first limit position to said second limit position by asecond given applied voltage of a smaller magnitude, a normally closedinterrupter switch in said housing, means driven in accordance with therotation of said antenna mount to repetitively and only momentarilya'ctuate said interrupter switch to an open condition, a first high-passfilter to connect said antenna to said lead-in wires, a first' low-passfilter connected to said lead-in wires at saidantenna rotatorunit,'.means for connecting said motor and said interrupterswitchrinrseries to said first low-pass filter, means for-connectingsaidsolenoid to said first low-pass filter. in parallel with` said motorand switch series combination, said remote control unit including, a-

frame, a reversibly rotatable ratcheting device journaled in said frame,spring means, manual means to selectively stress said spring means tourge said ratcheting device in opposite rotational directions, adouble-throw selector switch having first and second contacts and acommon contact and connected for simultaneous operation with said manualmeans, first, second, and third terminals adapted to be energized by analternating current source with said second given voltage between saidfirst and second terminals and said first given voltage between saidfirst and third terminals, means for connecting said first and secondselector switch contacts to said second and third source terminals,respectively, a rockable verge carried by said frame and operable topermit step by step rotational movements of said ratcheting device ineither rotational direction, a second low-pass filter connected to saidlead-in wires at said remote control unit, a second high-pass filter toconnect said radio device to said lead-in wires, means for connectingsaid first source terminal to said second low-pass filter, a currentresponsive relay connected to rock said verge, means for connecting saidselector switch common contact through said current relay to said secondlow-pass filter, said current relay energizable to actuated condition bycurrent flow therethrough to both said motor and said voltage responsivesolenoid and incapable of energization to actuated condition by currentflow therethrough to only said voltage responsive solenoid.

13. A remotely controlled rotator comprising an impulsing indicator andremote control unit and a rotator unit interconnectable by first andsecond conductors, said rotator unit including a housing, a mountrotatable relative to said housing, a reversible direct currentpermanent magnet motor interconnecting said housing and said mount torotate said mount in selective directions, first and second electricalterminals on said motor for energizing same, a normally closedinterrupter switch in said housing capable of being only momentarilyactuated to an open condition, means driven in accordance with therotation of said mount to repetitively actuate said switch, first andsecond terminals insulatively carried on said housing, means forconnecting said first and second housing terminals to said first andsecond motor terminals through said interrupter switch, said first andsecond' housing terminals adapted to be connected to said conductors,said impulsing indicator and remote control unit including a frame, areversibly rotatable ratcheting device carried in said frame, springmeans selectively stressable to urge said ratcheting device in oppositerotational directions, selector means operable in correspondence withsaid spring means to select the degree of rotation and hence theultimate position of said mount relative to said frame, a rockable vcrgeto release said ratcheting device in either direction step by step, asolenoid having an armature connected to rock said verge, first andsecond`source terminals adapted to be energized by an alternatingcurrent source, a double-throw selector switch having a commonconnection connected 'to said first source terminal, means physicallyinterconnecting said selector switch and said spring means forsimultaneous actuation, first and second rectifiers, winding means onsaid solenoid, said winding means having a terminal, means forconnecting said rectifiers in opposition to said winding means terminaland to said double-throw contacts of said selector switch, means forconnecting said winding means to said second source terminal and to saidlead-in wires, either direction of rotation of said mount effectingperiodic and only momentary operation of said interrupting switch tosaid open condition, open and closed conditions of said interruptingswitch eifecting off and on current conditions on said conductors, aposition indicator operable in correspondence with movement of saidratcheting device, and said solenoid being responsive to said ofi and oncurrent conditions on said conductors and on said winding means to rocksaid verge 14 to release said ratcheting device and thereby m'ove saidindicator step by step into a position corresponding to the position ofsaid ratcheting device.

l14. An impulsing indicator remotely controlled antenna rotatorcomprising a remote control unit and an antenna rotator unit forrotating a high frequency antenna having a shaft and having first andsecond lead-in wires connectable to a radio device, said antenna rotatorunit including a housing, an antenna shaft mount rotatable relative tosaid housing to rotate said antenna shaft, a reversible direct currentpermanent magnet motor interconnecting said housing and said mount torotate' said mount in selective directions, first and second electricalterminals on said motor for energizing same, a normally closedinterrupter switch in said housing capable of being only momentarilyactuated to an open condition, means driven in accordance with therotation of said antenna mount to repetitively actuate said switch,first, second, third, and fourth terminals insulatively carried on saidhousing, four terminal low-pass filter means connecting said first andsecond housing terminals to said first and second motor terminalsthrough said interrupter switch, said low-pass filter means having ahigh impedance to high frequency, high-pass filter means having a highimpedance to direct current connecting said first and second housingterminals with said third and fourth housing terminals, said third andfourth housing terminals adapted to be connected to said high frequencyantenna, and said first and second housing terminals adapted to beconnected to said antenna lead-in wires, said remote control unitincluding a frame, a reversibly rotatable ratcheting'device carried insaid frame, spring means selectively stressable to urge said ratchetingdevice in opposite rotational directions, a rockable verge to releasesaid ratcheting device in either direction step by step, a solenoidhaving an armature connected to rock said verge, first and second sourceterminals adapted to be energized by an alternating current source, adouble-throw selector switch having a common connection connected tosaid first source terminal, means physically interconnecting saidselector switch and said spring means for simultaneous actuation, firstand second rectifiers, winding means on said solenoid, said windingmeans having a terminal, means for connecting said rectifiers inopposition to said winding means terminal and to said double-throwcontacts of said selector switch, a second four terminal low-pass filtermeans, means for connecting said winding means to said source terminalsand to two terminals of said second low-pass filter means, means forconnecting the remaining two terminals of said second low-pass filtermeans to said lead-in wires, said second low-pass filter means having allow impedance to direct current and a high impedance to high frequency,and said radio device adapted to be connected to said lead-in wires' onthe antenna side of said second low-pass filter means through a secondhigh-pass filter means having a low impedance to high frequency and ahigh impedance to direct current, either direction of rotation of saidmount efifecting periodic and only momentary operation of saidinterrupting switch to said open condition, open and closed conditionsof said interrupting switch effecting off and on current conditions onsaid lead-in wires, an antenna position indicator operable incorrespondence with movement of said ratcheting device, and saidsolenoid being responsive to said off and on current conditions on saidlead-in wires and on said winding means to rock said verge to releasesaid ratcheting device and thereby move said indicator step by step intoa position corresponding to the position of said ratcheting device.

15. A remotely controlled antenna rotator comprising a remote controlunit and an antenna rotator unit interconnectable by two conductors,said antenna rotator unit including, a housing, an antenna shaft mountrotatable relative to said housing, a drive train having an outputconnected to said shaft mount, an electric motor driving said drivetrain, means for connecting said motor to said two conductors, a motordriven interrupter switch connectable to said two conductors andactuatable to establish first and second current conditions on said twoconductors, first electromagnetic means responsive to first and secondvoltage conditions to determine the rotational direction of said drivetrain, said remote control unit including voltage terminals, a selectorswitch connected to said terminals and to said two conductors to selectsaid first and second voltage conditions on said two conductors, secondelectromagnetic means connected to said two conductors and responsive tosaid first and second current conditions on said two conductors, andmeans to operate said selector switch from said second electromagneticmeans.

16. A control and power system operable from a first type power voltagesource and comprising, control and power units interconnectable by onlyfirst and second conductors, energization means for supplying said firsttype power voltages from said control unit to said two conductors andhence to said power unit for use therein, electrical control means forsupplying control voltage conditions on said two conductors from saidcontrol unit to said power unit for control thereof, and secondelectrical control means for supplying control current conditions onsaid two conductors from said power unit to said control unit forcontrol thereof.

17. A control and power system operable from a first type power voltagesource and comprising, control and power units interconnectable by onlyfirst and second conductors, means for supplying said first type powervoltages from said control unit to said two conductors and hence to saidpower unit for use therein, means for conducting second type voltages onsaid two conductors from a point near said power unit to a point nearsaid control unit, means for supplying control voltage conditions onsaid two conductors from said control unit to said power unit forcontrol thereof, means for supplying control current conditions on saidtwo conductors from said power unit to said control unit for controlthereof, and means in said control unit for additionally utilizing saidcontrol current conditions as indicating means.

18. A power and control system comprising; a control unit and a driveunit interconnectable by two conductors;

said drive unit including, an electric motor connectable to said twoconductors, a drive train driven by said motor, first electrical meansdriven by said motor to establish first and second current conditions onsaid two conductors, and first electromagnetic means responsive to firstand second voltage conditions on said two conductors to determine firstand second conditions of said drive train; said control unit includingvoltage terminals, second electrical means connected to said terminalsand to said two conductors to select said first and second voltageconditions thereon, and second electromagnetic means connected to saidtwo conductors and responsive to said first and second currentconditions on said two conductors and connected to operate said secondelectrical means.

19. A power and control system comprising; a control unit and a driveunit interconnectable by only two conductors; said drive unit including,an electric motor connectable only to said two conductors, a drive traindriven by said motor, first electrical means driven by said motor toestablish first and second current conditions on said two conductors,and first electromagnetic means responsive to first and second voltageconditions on only said two conductors to determine the rotationaldirection of said drive train; said control unit including voltageterminals, second electrical means connected to said terminals and tosaid two conductors to select said first and second voltage conditionsthereon, second electromagnetic means connected to said two conductorsand responsive to said first and second current conditions only on saidtwo conductors and connected to operate said second electrical means,'anindicator, and means to operate said indicator from said secondelectromagnetic means.

References Cited in the file of this patent UNITED STATES PATENTS835,381 Willard Nov. 6, 1906 835,382 Willard Nov. 6, 1906 1,018,765Janette Feb. 27, 1912 1,862,137 Curtis et al. June 7, 1932 1,979,315Cotter Nov. 6, 1934 2,350,740 Fischer June 6, 1944 2,575,357 NicholsNov. 20, 1951 2,682,740 Jordan .Tune 29, 1954

